Effects of Electromagnetic Stirring on Microstructure and Process of Semi-solid Al-Zn-Mg-Cu Alloy
Through a new multi-layer electromagnetic stirring method,effects of stirring methods,casting tempera-ture,stirring rate,and stirring time on properties of semi-solid Al-Zn-Mg-Cu alloy as well as the mechanism were investigated.The results reveal that multi-layer reverse stirring method is optimal,and the optimal process parameters are casting temperature of 640℃,stirring rate of 3 000 r/min,and stirring time of 30 s,where semi-solid slurry struc-ture with well grain size and morphology can be obtained.The flow quantity of alloy melt is increased,and the unifor-mity of temperature field and solute field are improved by adopting multi-layer reverse electromagnetic stirring,enhanc-ing the disorder level of alloy melt,and improving the size and morphology of primary phases.
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